I bought my Mavic Air in Dec 2018. Mid Jan I had it tracking me on a golf course; heard a thump behind me, and the drone was on the ground! I was in gesture mode...no controller, so I thought it was a glitch. Every since that day I had been worried it was going to happen again. I have flown that drone over so much water, and so many places where I would not have not been able to retrieve it...…. Well, I am a very lucky individual because it happened to me again yesterday. I was flying in my back yard, trying to get use to my camera controls... just taking picture of my house; it fell to the ground again. I was hovering about 25 yard away, about 3 feet from the ground... looked down to adjust my camera settings and I heard that thump again; the drone was on the ground. I got no errors, not warnings, not loss of signal, no nothing!! Controller was on, drone was still on, no propeller movement. Emailed DJI yesterday and they responded by asking me to send them the drone so they could evaluate the problems. Will give them a call tmw durning business hours. I don't have that" refresh packet," but I will when they return my drone!!! Will let you know how things go.
I have read that others have had the same issues also. Their is definitely a bug with the Mavic Air, hope to have it fixed and back in the air some time soon.